Crock Pot Apple Butter

5 1/2 lbs. apples, peeled and finely chopped
4 cups sugar
2-3 tsp. ground cinnamon
1/4 tsp. ground cloves
1/4 tsp. ground nutmeg
1/4 tsp. salt

Place apples in slow cooker. Add res of ingredients and mix well. Cover and cook on high for 1 hour. Reduce heat to low. Cover and cook 9-11 hours or until thick and dark brown, stirring occasionally. uncover and cook 1 more hour. If a smoother apple butter id desired, may puree in blender or food mill. Process 10 minutes in hot water bath in pint jars or may freeze.